engine problem

1993 BUICK LESABRE

133,000 MILES • 6 CYL • FWD • AUTOMATIC

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I have a 1993 Buick Lasabre and its been sitting up for a couple of years and for the past few months I have got it started and did a small amount of work to get it going such as battery spark plugs and wires. Just recently got a service engine light on but before this the car did a some occasional bogging down hesitation feel during regular driving and any speed. Just yesterday received a service engine light. took it to auto part store to scan codes. the scan would not work from connection.What can cause it not to read and what are my possible problems based on how its acting.

Mar 30, 2011 at 12:24 AM

JDL

CAR REPAIR CONTRIBUTOR
16,098 POSTS

Does the check engine lite work? You can check codes yourself, use jumper wire between A & B terminals at data link connector, key on, no crank. The mil starts flashing, you count the flashes to get the codes. I've seen mils that wouldn't work, maybe the bulb was burned out or poor connection? I used a scanner at the datalink connector, looked at live engine data, looked good to me.

Use a gage and check fuel pressure. Some of the national brand autostores used to loan out a fuel pressure gage.

Mar 30, 2011 at 12:41 AM

CARADIODOC

CAR REPAIR CONTRIBUTOR
34,309 POSTS

Possible mass air flow sensor is dirty or check for leaks in the fresh air tube between the sensor and the throttle body. Also check the vacuum hoses for leaks. If any air gets into the engine that doesn't go through the mass air flow sensor, the Engine Computer won't know it's there so it won't command enough fuel to go with it.

Mar 30, 2011 at 12:43 AM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.